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RU2013102499A - METHOD AND DEVICE RELATED TO LIMITING THE DISPENSER TEMPERATURE IN THE SCR SYSTEM - Google Patents

METHOD AND DEVICE RELATED TO LIMITING THE DISPENSER TEMPERATURE IN THE SCR SYSTEM Download PDF

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Publication number
RU2013102499A
RU2013102499A RU2013102499/06A RU2013102499A RU2013102499A RU 2013102499 A RU2013102499 A RU 2013102499A RU 2013102499/06 A RU2013102499/06 A RU 2013102499/06A RU 2013102499 A RU2013102499 A RU 2013102499A RU 2013102499 A RU2013102499 A RU 2013102499A
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temperature
engine
dispenser
exhaust
reducing substance
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RU2013102499/06A
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Russian (ru)
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RU2530681C2 (en
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Андреас ЛИЛЬЕСТРАНД
Пер БРЕМБЕРГ
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Сканиа Св Аб
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1446—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/05—Systems for adding substances into exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1493—Purging the reducing agent out of the conduits or nozzle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/04—Methods of control or diagnosing
    • F01N2900/0408—Methods of control or diagnosing using a feed-back loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
    • F01N2900/1806—Properties of reducing agent or dosing system
    • F01N2900/1811—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D2041/0265—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to decrease temperature of the exhaust gas treating apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0802—Temperature of the exhaust gas treatment apparatus
    • F02D2200/0804—Estimation of the temperature of the exhaust gas treatment apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/18—Control of the engine output torque
    • F02D2250/26—Control of the engine output torque by applying a torque limit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
    • F02D41/0052—Feedback control of engine parameters, e.g. for control of air/fuel ratio or intake air amount
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/008—Controlling each cylinder individually
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
    • F02P5/15—Digital data processing
    • F02P5/1502—Digital data processing using one central computing unit
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

1. Способ, относящийся к системе SCR для очистки выхлопных газов из двигателя (150), содержащей дозатор (250), расположенный в тепловом контакте с системой выпуска двигателя и предназначенный для подачи восстанавливающего вещества в выхлопную трубу (240) системы выпуска, причем способ включает этап, на которомопределяют (s340), имеется ли нежелательный уровень температуры дозатора (250), отличающийся тем, что он включает этап, на котором:ограничивают (s360) температуру выхлопной трубы (240) путем управления работой двигателя, если обнаруживается нежелательный уровень температуры.2. Способ по п.1, отличающийся тем, что ограничение температуры достигается путем снижения максимального доступного крутящего момента у выходного вала двигателя (150).3. Способ по п.1 или 2, отличающийся тем, что ограничение температуры достигается путем воздействия на содержание EGR двигателя (150).4. Способ по п.1 или 2, отличающийся тем, что ограничение температуры достигается путем воздействия на моменты впрыска топлива у, по меньшей мере, одного цилиндра двигателя (150) или путем воздействия на время зажигания у, по меньшей мере, одного цилиндра двигателя (150).5. Способ по п.1 или 2, отличающийся тем, что нежелательный уровень температуры задают на основе характеристик восстанавливающего вещества.6. Способ по п.1 или 2, отличающийся тем, что этап, на котором определяют, имеется ли нежелательный уровень температуры дозатора (250), основывается на, по меньшей мере, одном из следующих этапов, на которых:измеряют температуру (Т1) непосредственно у дозатора (250);измеряют температуру у потока выхлопных газов в выхлопной трубе (240) ивычисляют температуру дозатора (250) посредств�1. A method related to an SCR system for purifying exhaust gases from an engine (150) comprising a dispenser (250) located in thermal contact with an engine exhaust system and for supplying a reducing substance to an exhaust pipe (240) of an exhaust system, the method comprising the step of determining (s340) whether there is an undesirable temperature level of the dispenser (250), characterized in that it includes the step of: limiting (s360) the temperature of the exhaust pipe (240) by controlling the operation of the engine if an unwanted condition is detected temperature level. 2. The method according to claim 1, characterized in that the temperature limitation is achieved by reducing the maximum available torque at the engine output shaft (150). A method according to claim 1 or 2, characterized in that the temperature limitation is achieved by affecting the EGR content of the engine (150). The method according to claim 1 or 2, characterized in that the temperature limitation is achieved by affecting the moments of fuel injection at least one engine cylinder (150) or by affecting the ignition time of at least one engine cylinder (150 ).5. The method according to claim 1 or 2, characterized in that the undesirable temperature level is set based on the characteristics of the reducing substance. The method according to claim 1 or 2, characterized in that the step of determining whether there is an undesirable temperature level of the dispenser (250) is based on at least one of the following steps, on which: temperature (T1) is measured directly the metering device (250); measure the temperature at the exhaust stream in the exhaust pipe (240) and calculate the temperature of the metering device (250) using

Claims (17)

1. Способ, относящийся к системе SCR для очистки выхлопных газов из двигателя (150), содержащей дозатор (250), расположенный в тепловом контакте с системой выпуска двигателя и предназначенный для подачи восстанавливающего вещества в выхлопную трубу (240) системы выпуска, причем способ включает этап, на котором1. A method related to an SCR system for cleaning exhaust gases from an engine (150) comprising a dispenser (250) located in thermal contact with an engine exhaust system and for supplying a reducing substance to an exhaust pipe (240) of an exhaust system, the method comprising stage at which определяют (s340), имеется ли нежелательный уровень температуры дозатора (250), отличающийся тем, что он включает этап, на котором:determine (s340) whether there is an undesirable temperature level of the dispenser (250), characterized in that it includes a stage in which: ограничивают (s360) температуру выхлопной трубы (240) путем управления работой двигателя, если обнаруживается нежелательный уровень температуры.limit (s360) the temperature of the exhaust pipe (240) by controlling engine operation if an undesired temperature level is detected. 2. Способ по п.1, отличающийся тем, что ограничение температуры достигается путем снижения максимального доступного крутящего момента у выходного вала двигателя (150).2. The method according to claim 1, characterized in that the temperature limitation is achieved by reducing the maximum available torque at the motor output shaft (150). 3. Способ по п.1 или 2, отличающийся тем, что ограничение температуры достигается путем воздействия на содержание EGR двигателя (150).3. The method according to claim 1 or 2, characterized in that the temperature limitation is achieved by affecting the EGR content of the engine (150). 4. Способ по п.1 или 2, отличающийся тем, что ограничение температуры достигается путем воздействия на моменты впрыска топлива у, по меньшей мере, одного цилиндра двигателя (150) или путем воздействия на время зажигания у, по меньшей мере, одного цилиндра двигателя (150).4. The method according to claim 1 or 2, characterized in that the temperature limitation is achieved by affecting the moments of fuel injection at least one engine cylinder (150) or by affecting the ignition time of at least one engine cylinder (150). 5. Способ по п.1 или 2, отличающийся тем, что нежелательный уровень температуры задают на основе характеристик восстанавливающего вещества.5. The method according to claim 1 or 2, characterized in that the undesirable temperature level is set based on the characteristics of the reducing substance. 6. Способ по п.1 или 2, отличающийся тем, что этап, на котором определяют, имеется ли нежелательный уровень температуры дозатора (250), основывается на, по меньшей мере, одном из следующих этапов, на которых:6. The method according to claim 1 or 2, characterized in that the step of determining whether there is an undesirable temperature level of the dispenser (250) is based on at least one of the following steps, on which: измеряют температуру (Т1) непосредственно у дозатора (250);measure the temperature (T1) directly at the dispenser (250); измеряют температуру у потока выхлопных газов в выхлопной трубе (240) иmeasuring the temperature of the exhaust stream in the exhaust pipe (240) and вычисляют температуру дозатора (250) посредством модели вычисления.calculate the temperature of the dispenser (250) by means of a calculation model. 7. Способ по п.1 или 2, отличающийся тем, что восстанавливающее вещество является восстанавливающим веществом на основе мочевины.7. The method according to claim 1 or 2, characterized in that the reducing substance is a urea-based reducing substance. 8. Устройство для системы SCR для очистки выхлопных газов из двигателя (150), содержащей дозатор (250), расположенный в тепловом контакте с системой выпуска двигателя и предназначенный для подачи восстанавливающего вещества в выхлопную трубу (240) системы выпуска, причем устройство содержит8. A device for an SCR system for cleaning exhaust gases from an engine (150) comprising a dispenser (250) located in thermal contact with an engine exhaust system and for supplying a reducing substance to an exhaust pipe (240) of an exhaust system, the device comprising средство (200; 210; 400) для определения, имеется ли нежелательный уровень температуры дозатора (250), отличающееся тем, что оно содержит:means (200; 210; 400) for determining whether there is an undesirable temperature level of the dispenser (250), characterized in that it contains: средство (200; 210; 400) для ограничения температуры выхлопной трубы (240) путем управления работой двигателя, если обнаруживается нежелательный уровень температуры.means (200; 210; 400) for limiting the temperature of the exhaust pipe (240) by controlling the operation of the engine if an undesirable temperature level is detected. 9. Устройство по п.8, отличающееся тем, что оно содержит средство (200; 210; 400) для снижения максимального доступного крутящего момента у выходного вала двигателя (150), чтобы добиться ограничения температуры.9. The device according to claim 8, characterized in that it comprises means (200; 210; 400) for reducing the maximum available torque at the engine output shaft (150) in order to achieve temperature limitation. 10. Устройство по п.8 или 9, отличающееся тем, что оно содержит средство для воздействия на содержание EGR двигателя (150), чтобы добиться ограничения температуры.10. The device according to claim 8 or 9, characterized in that it contains means for influencing the EGR content of the engine (150) in order to achieve temperature limitation. 11. Устройство по п.8 или 9, отличающееся тем, что ограничение температуры достигается путем воздействия на моменты впрыска топлива у, по меньшей мере, одного цилиндра двигателя (150) или путем воздействия на время зажигания у, по меньшей мере, одного цилиндра двигателя (150).11. The device according to claim 8 or 9, characterized in that the temperature limitation is achieved by affecting the moments of fuel injection at least one engine cylinder (150) or by affecting the ignition time of at least one engine cylinder (150). 12. Устройство по п.8 или 9, отличающееся тем, что нежелательный уровень температуры задается на основе характеристик восстанавливающего вещества.12. The device according to claim 8 or 9, characterized in that the undesirable temperature level is set based on the characteristics of the reducing substance. 13. Устройство по п.8 или 9, отличающееся тем, что оно содержит, по меньшей мере, одно из:13. The device according to claim 8 or 9, characterized in that it contains at least one of: средства (220) для измерения температуры непосредственно у дозатора;means (220) for measuring temperature directly at the dispenser; средства для измерения температуры у потока выхлопных газов в выхлопной трубе иmeans for measuring the temperature of the exhaust stream in the exhaust pipe and средства (200; 210; 400) для вычисления температуры дозатора посредством модели вычисления.means (200; 210; 400) for calculating the temperature of the dispenser by means of a calculation model. 14. Устройство по п.8 или 9, отличающееся тем, что восстанавливающее вещество является восстанавливающим веществом на основе мочевины.14. The device according to claim 8 or 9, characterized in that the reducing substance is a urea-based reducing substance. 15. Транспортное средство (100; 110), отличающееся тем, что оно содержит устройство по любому из пп.8-14.15. Vehicle (100; 110), characterized in that it contains a device according to any one of paragraphs.8-14. 16. Транспортное средство (100; 110) по п.15, отличающееся тем, что оно является грузовиком, автобусом или легковым автомобилем.16. A vehicle (100; 110) according to claim 15, characterized in that it is a truck, a bus or a car. 17. Машиночитаемый носитель, имеющий компьютерную программу, содержащую программный код, который при его выполнении в компьютере или электронном блоке побуждает компьютер или электронный блок управления выполнять этапы способа по любому из пп.1-7. 17. Machine-readable medium having a computer program containing program code, which when executed in a computer or electronic unit causes the computer or electronic control unit to perform the steps of the method according to any one of claims 1 to 7.
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